Senecio longilobus
| Threadleaf ragwort | |
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| Threadleaf ragwort | |
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Subfamily: | Asteroideae |
| Tribe: | Senecioneae |
| Genus: | Senecio |
| Species: | S. flaccidus |
| Binomial name | |
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Senecio flaccidus Less. |
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| Range of S. flaccidus | |
| Synonyms | |
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Senecio longilobus Benth |
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Senecio longilobus Benth
Senecio filifolius (L.) Hook.
Senecio douglasii DC.
Senecio monoensis Greene
Senecio flaccidus, formerly recorded as Senecio douglasii (in honor of the botanist David Douglas) member of the daisy family and genus Senecio also known as threadleaf ragwort (and threadleaf groundsel, bush senecio, creek senecio, shrubby butterweed, comb butterweed, smooth threadleaf ragwort, Mono ragwort, Douglas ragwort, Douglas groundsel, sand wash groundsel, felty groundsel, old man, yerba cana, squawweed or cenicillo) is a native of the southwestern Great Plains of North America.
Threadleaf ragwort is a fast-growing, short-lived (3 to 6 years) bushy perennial shrub growing to 4 feet 6 inches (1.37 m); common in gravelly washes, dry creek beds, along roads and trails and mostly away from the coast.
Colonizing disturbed areas including over-grazed lands, Senecio flaccidus helps to achieve a quick ground cover and helps to stabilize the soil for longer-lived perennials but in this situation makes poor foraging for cattle and horses due to the alkaloids contained in the plant which cause liver disease when consumed in large quantities.
Also known as Senecio longilobus, one of the alkaloids found in this species is longilobine, as well as senecionine, seneciphylline, florosenine, otonecine-based florosenine, and retrorsine.
Like many Senecio Senecio flaccidus likes disturbed habitats, this one preferring overgrazed rangelands, dried up stream beds and desert grasslands; at altitudes above 1,800 feet (550 m) and below 6,500 feet (2,000 m).
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Wikipedia